EP 4359451 A1 20240501 - UTILIZATION OF 1-HEXENE IN MULTI-STAGE POLYOLEFIN PRODUCTION
Title (en)
UTILIZATION OF 1-HEXENE IN MULTI-STAGE POLYOLEFIN PRODUCTION
Title (de)
VERWENDUNG VON 1-HEXEN BEI DER MEHRSTUFIGEN POLYOLEFINHERSTELLUNG
Title (fr)
UTILISATION DE 1-HEXÈNE DANS LA PRODUCTION DE POLYOLÉFINES À PLUSIEURS ÉTAPES
Publication
Application
Priority
- EP 21181475 A 20210624
- EP 2022067184 W 20220623
Abstract (en)
[origin: WO2022268960A1] The disclosure relates to a process for polymerising olefins in multi stage polymerisation process configuration, the process comprising a) polymerising in a first polymerisation step ethylene, optionally in the presence of at least one other alpha olefin comonomer, in the presence of a polymerisation catalyst so as to form a first polymer component (A); and b) polymerising in a second polymerisation step in gas phase a predetermined monomer mixture comprising ethylene and 1-hexene, optionally in the presence of at least one other alpha olefin comonomer, in the presence of the first polymer component (A) of step a), so as to form a second polymer component (B), wherein the multimodal polyethylene polymer produced by the present process comprises 1-hexene comonomer and at least one further C4-10-comonomer, and wherein the predetermined monomer mixture comprising ethylene and 1-hexene is fed into the second polymerisation step from the beginning of its start up. The disclosure further relates to use of 1-hexene in a gas phase olefin polymerisation step for improving performance of single-site polymerisation catalyst in multi-stage olefin copolymerisation process. The disclosure still further relates to a method for improving performance of single-site polymerisation catalyst in a multi-stage olefin polymerisation comprising feeding a predetermined monomer mixture comprising ethylene and 1-hexene into the gas phase polymerisation step from the beginning of its start up.
IPC 8 full level
C08F 210/16 (2006.01); C08F 2/00 (2006.01); C08F 4/659 (2006.01); C08L 23/08 (2006.01)
CPC (source: EP KR)
C08F 2/001 (2013.01 - KR); C08F 2/34 (2013.01 - KR); C08F 4/65927 (2013.01 - KR); C08F 210/16 (2013.01 - EP KR); C08L 23/0815 (2013.01 - EP); C08F 2500/05 (2013.01 - KR); C08L 2205/025 (2013.01 - EP); C08L 2308/00 (2013.01 - EP); C08L 2314/06 (2013.01 - EP)
C-Set (source: EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022268960 A1 20221229; CA 3223212 A1 20221229; CN 117561287 A 20240213; EP 4359451 A1 20240501; KR 20240023652 A 20240222
DOCDB simple family (application)
EP 2022067184 W 20220623; CA 3223212 A 20220623; CN 202280045300 A 20220623; EP 22737616 A 20220623; KR 20247002599 A 20220623